*** Complete Guide on How to Create a New Alt Coin ***

[gjhiggins]

For i can see it seems a problem with the mgw47-mt thing

Indeed:


g++ -Wl,--large-address-aware -static -static-libgcc -static-libstdc++ -Wl,-s -mthreads -Wl,-subsystem,windows -o release\Coin-qt.exe object_script.Coin
-qt.Release  -L"c:\Qt\4.8.5\lib" -lmingwthrd -lmingw32 -lqtmain build\bitcoin-qt_res.o -LC:/deps/miniupnpc -lminiupnpc -liphlpapi  -lshlwapi -LC:/deps/boost_1_5
5_0/stage/lib -LC:/deps/db-4.8.30.NC/build_unix -LC:/deps/openssl-1.0.1j -LC:/deps/qrencode-3.4.4/.libs -lssl -lcrypto -ldb_cxx -lws2_32 -lshlwapi -lmswsock -lo
le32 -loleaut32 -luuid -lgdi32 -lboost_system-mgw47-mt-sd-1_53 -lboost_filesystem-mgw47-mt-sd-1_53 -lboost_program_options-mgw47-mt-sd-1_53 -lboost_thread-mgw47
-mt-sd-1_53 -lboost_chrono-mgw47-mt-sd-1_53 -lQtGui4 -lQtCore4
C:/mingw32/bin/../lib/gcc/i686-w64-mingw32/4.9.2/../../../../i686-w64-mingw32/bin/ld.exe: cannot find -ldb_cxx
C:/mingw32/bin/../lib/gcc/i686-w64-mingw32/4.9.2/../../../../i686-w64-mingw32/bin/ld.exe: cannot find -lboost_system-mgw47-mt-sd-1_53


perhaps you'll have better luck with something like mgw49-mt-sd-1_55 or near offer.

The resolution lies in the <coinname>.pro file, look for where BOOST_LIB_SUFFIX is bound and ensure the numbers match the versions of the installed mingw and boost packages.

Cheers

Graham

[aleddr]

For i can see it seems a problem with the mgw47-mt thing

Graham

 
YOU FIX MY BOOST PROBLEM THANKS!!
 

right now seraching to fix this:

c:\test\coin-master\src/txdb-leveldb.h:119: undefined reference to `leveld
b::Status::ToString() const'
collect2.exe: error: ld returned 1 exit status
make: *** [coind.exe] Error 1

 


*EDIT: leveldb recompiled in windows... WORKS FINE NOW!

[fookie]

That is cool ,any guide on how to fork ETH?

[picchio]

That is cool ,any guide on how to fork ETH?

Sorry, little english ...
Like this?: https://github.com/ledgerlabs/ethereum-getting-started/wiki/local-node
No need to fork, just start a new chain.

[fisheater]

lol, glad to see people still interested in my "how-to" 4 years ago 

[MickGhee]

thanks for the infoemations great help

[Arnon6766]

Hi,
Does anyone know what my error means when I start litecoin-qt
debug.log:
ERROR: ReadBlockFromDisk: Errors in block header at CBlockDiskPos(nFile=0, nPos=602)
*** Failed to read block
Error Message when starting:
Error: An severe internal Error occured, see debug.log for details
Any Help would be apprecitaed
Thanks in advance

[LynXMaSTeR]

Is there anyone who produces his own coin in this way?

[forkedchain]

Is there anyone who produces his own coin in this way?

  only like 1000 times so far.  welcome to the party

[webvn2k]

anyone can tell me , i want have  etc 1000,000 coin for developer or miner first (me-make coin) ,what name file i can change ? thank you

[freemanjackal]

i have managed to set to work a version 8.7 or something like that, but i cant do it with the last version, stuck in the genesis block, i have generated some hash that dont throw the assert, but it seems they are not right because when i run ./litecoind sometimes gives an error that cant find the best block; or cant read the block (when this happens i reindex and dont throw any error but stay like running but do nothing)

with this I try to generate the genesis block, but never do more than 1 iteration, and cant be rigth, it should take a while to find the nonce

Code:

for(genesis.nNonce = 0; consensus.powLimit < genesis.GetHash()  ; genesis.nNonce++){ }

the hash function pass the assert, but it gives me then some of the errors mentioned above

[mdodong]

I know this is old but it's worth learning.

[Prodigan786]

Thanks a lot its really awesome being a decade as a programmer i never thought to create a coin . Now its given initial pushing thing .I got some priority work to finish once done i will dedicate some time and try to create coin . i have C++ in college days even i dont think its a big deal .

[sad_miner]

lol, glad to see people still interested in my "how-to" 4 years ago 

Oh yes, looks like a lot of fun!  Trying this out now.

Does the guide need to be updated?  Who found they needed to do a bit of extra research?  I'm finding I have to look elsewhere to change port numbers for a start...

Thanks for the guide to making new altcoins   Love it!  I hope to learn quite a bit from tinkering with the source and creating a nothing coin.

[Asimmo]

Does there exist any new such thread, with current reality, how to create a coin?
Or it`s the same?

[freemanjackal]

it is a good start point, but if you are going to code with latest release, this guide is obsolote, lot of things have changed since it was created.
So it needs to be updated, most of all, how to create the genesis block.

[freemanjackal]

you could try this one
http://dillingers.com/blog/2015/04/18/how-to-make-an-altcoin/

[INRI666]

you could try this one
http://dillingers.com/blog/2015/04/18/how-to-make-an-altcoin/

Thanks I'll read that later and try that one out. Thanks for sharing.

Did you try the guide yourself, and how good is it?

[freemanjackal]

it is easier with older versions, the newest one have changed a little bit, and can be harder, good luck with that

[chian_reaction]

lol, glad to see people still interested in my "how-to" 4 years ago 

Thanks a lot for the detailed guide. I was searching for this for many days. This was the closest to what I was trying to do.
By the way, The code has changed a lot in the most recent version of bitcoin's repo. I was facing issues with OpenSSL headers when I tried to run the older version of the code.

I managed to change the parameters in chainparams.cpp and get the new hashblock and merkle hash. But stuck at finding the checkpoint methods that you mentioned in the guide. Without updating those the core is trying to load the checkpoints from disk and ends up in segmentation fault.

Any solution or direction I need to look into might help. Thanks a lot again.

Here is my debug.log

Code:

	2017-07-31 21:06:42 Bitcoin version v0.14.99.0-42307c4bf-dirty
	2017-07-31 21:06:42 InitParameterInteraction: parameter interaction: -whitelistforcerelay=1 -> setting -whitelistrelay=1
	2017-07-31 21:06:42 Assuming ancestors of block 0000000000000000003b9ce759c2a087d52abc4266f8f4ebd6d768b89defa50a have valid signatures.
	2017-07-31 21:06:42 Using the 'standard' SHA256 implementation
	2017-07-31 21:06:42 Using RdRand as an additional entropy source
	2017-07-31 21:06:42 Default data directory /Users/username/Library/Application Support/Bitcoin
	2017-07-31 21:06:42 Using data directory /Users/username/Library/Application Support/Bitcoin
	2017-07-31 21:06:42 Using config file /Users/username/Library/Application Support/Bitcoin/bitcoin.conf
	2017-07-31 21:06:42 Using at most 125 automatic connections (4864 file descriptors available)
	2017-07-31 21:06:42 Using 16 MiB out of 32/2 requested for signature cache, able to store 524288 elements
	2017-07-31 21:06:42 Using 16 MiB out of 32/2 requested for script execution cache, able to store 524288 elements
	2017-07-31 21:06:42 Using 2 threads for script verification
	2017-07-31 21:06:42 scheduler thread start
	2017-07-31 21:06:42 HTTP: creating work queue of depth 16
	2017-07-31 21:06:42 No rpcpassword set - using random cookie authentication
	2017-07-31 21:06:42 Generated RPC authentication cookie /Users/username/Library/Application Support/Bitcoin/.cookie
	2017-07-31 21:06:42 HTTP: starting 4 worker threads
	2017-07-31 21:06:42 init message: Verifying wallet(s)...
	2017-07-31 21:06:42 Using BerkeleyDB version Berkeley DB 4.8.30: (April  9, 2010)
	2017-07-31 21:06:42 Using wallet wallet.dat
	2017-07-31 21:06:42 CDBEnv::Open: LogDir=/Users/username/Library/Application Support/Bitcoin/database ErrorFile=/Users/username/Library/Application Support/Bitcoin/db.log
	2017-07-31 21:06:42 Cache configuration:
	2017-07-31 21:06:42 * Using 2.0MiB for block index database
	2017-07-31 21:06:42 * Using 8.0MiB for chain state database
	2017-07-31 21:06:42 * Using 440.0MiB for in-memory UTXO set (plus up to 286.1MiB of unused mempool space)
	2017-07-31 21:06:42 init message: Loading block index...
	2017-07-31 21:06:42 Opening LevelDB in /Users/username/Library/Application Support/Bitcoin/blocks/index
	2017-07-31 21:06:42 Opened LevelDB successfully
	2017-07-31 21:06:42 Using obfuscation key for /Users/username/Library/Application Support/Bitcoin/blocks/index: 0000000000000000
	2017-07-31 21:06:42 Opening LevelDB in /Users/username/Library/Application Support/Bitcoin/chainstate
	2017-07-31 21:06:42 Opened LevelDB successfully
	2017-07-31 21:06:42 Using obfuscation key for /Users/username/Library/Application Support/Bitcoin/chainstate: 7bbd099730c6ddd0
	2017-07-31 21:06:42 LoadBlockIndexDB: last block file = 0
	2017-07-31 21:06:42 LoadBlockIndexDB: last block file info: CBlockFileInfo(blocks=0, size=0, heights=0...0, time=1970-01-01...1970-01-01)
	2017-07-31 21:06:42 Checking all blk files are present...
	2017-07-31 21:06:42 LoadBlockIndexDB: transaction index disabled
	2017-07-31 21:06:42 Initializing databases...
	2017-07-31 21:06:42 Pre-allocating up to position 0x1000000 in blk00000.dat
	2017-07-31 21:06:42 init message: Verifying blocks...
	2017-07-31 21:06:42  block index             208ms
	2017-07-31 21:06:42 init message: Loading wallet...
	2017-07-31 21:06:42 nFileVersion = 149900
	2017-07-31 21:06:42 Keys: 2001 plaintext, 0 encrypted, 2001 w/ metadata, 2001 total
	2017-07-31 21:06:42  wallet                  127ms
	2017-07-31 21:06:42 setKeyPool.size() = 1999
	2017-07-31 21:06:42 mapWallet.size() = 0
	2017-07-31 21:06:42 mapAddressBook.size() = 1
	2017-07-31 21:06:42 ERROR: ReadBlockFromDisk: Errors in block header at CBlockDiskPos(nFile=0, nPos=8)
	2017-07-31 21:06:42 *** Failed to read block
	2017-07-31 21:06:42 Error: Error: A fatal internal error occurred, see debug.log for details